The gimmick in "One Day" (it's never anything more than a gimmick) is a dramatic structure (though there's very little drama) that follows the evolution of an English friendship by revisiting the two friends (Anne Hathaway's Emma and Jim Sturgess's Dexter) on every July 15 (their college graduation day, and their first day together) for two decades. And speaking of gimmicks, did the stops and starts of that previous sentence annoy you? Did the parentheticals put you off? They're only a pale imitation of how annoying the herky-jerky rhythm of the movie gets to be. By the fourth or fifth July 15 you may...